Book Description

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 edition. Excerpt: ...in the lower inner quadrant of the lens, and in any instance it is diagnosed with the ophthalmoscope by seeing dark spicules or striae like needles pointing toward the center of the lens. This is the most common form of beginning senile cataract (No. 4, in Fig. 64). Cataracts are also named from their causes. Choroidal Cataract usually begins as a nuclear cataract; it is brown in color and is the result of choroidal disease; from its color and resemblance to mahogany wood it has been called "mahogany cataract." Traumatic Cataract is a cataract caused by injury. In the so-called Black Cataract the lens becomes quite dark in color from absorption of or staining by pigment. Morgagnian Cataract is an over-ripe cataract. The cortical substance has become fluid and the nucleus remains hard and drops to the lower portion of the lens capsule, which now resembles a bag containing a milky fluid. The iris often appears tremulous. Senile Cataract is the cataract of old age; a better name would be hard cataract, or an opaque sclerosed lens. Whenever partial opacity of the lens is diagnosed it is wise to study the whole lens carefully, and also the interior of the eye, if the opacity does not interfere too greatly with a view of the eye ground, and to do this it will be necessary to dilate the pupil with a solution of cocain (Chapter I.). Subluxation or Dislocation of the Lens. If the ligament of the lens becomes relaxed or broken partially or completely, the lens will become subluxated or dislocated; in the former instance its edge may be seen in the pupillary area; if dislocated by force the lens may pass through the pupil into the anterior chamber or fall back into the vitreous. If the lens is in the anterior chamber it can be easily...